--- title: "Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik Mono S4 Halfcut Trend White 450W - Solar Panel Comparison | ComparePV" description: "Compare Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik Mono S4 Halfcut Trend White 450W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-trend-white-445w/solar-fabrik-mono-s4-halfcut-trend-white-450w" updated: 2026-09-11 --- # Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik Mono S4 Halfcut Trend White 450W 450W leads on the differences that matter The largest is module efficiency: 0.26 pp more efficient. 17 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Solar-Fabrik Mono S4 Halfcut Trend White 445W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-trend-white-445w) | [Solar-Fabrik Mono S4 Halfcut Trend White 450W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-trend-white-450w) | | Manufacturer | Solar-Fabrik | Solar-Fabrik | | Power | 445 Wp | 450 Wp | | Efficiency | 22.27 % | 22.53 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 445W | 450W | Difference | | --- | --- | --- | --- | | Module efficiency | 22.27 % | 22.53 % | +0.26 pp for 450W | ## Every compared parameter | Parameter | 445W | 450W | | --- | --- | --- | | Rated power | 445 Wp | 450 Wp | | Module efficiency | 22.27 % | 22.53 % | | Power density | 222.7 Wp/m² | 225.2 Wp/m² | | Open-circuit voltage | 39.59 V | 39.79 V | | Voltage at max power | 33.04 V | 33.23 V | | Short-circuit current | 13.93 A | 13.99 A | | Current at max power | 13.47 A | 13.55 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 1762x1134x30 mm | 1762x1134x30 mm | | Module area | 1.998 m² | 1.998 m² | | Weight | 24.9 kg | 24.9 kg | | Weight per kWp | 56.0 kg/kWp | 55.3 kg/kWp | | Product warranty | 30 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | Bifacial | Yes | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 445W:** 14,931 kWh - **Cumulative output, 450W:** 15,098 kWh - **Gap:** 167 kWh ## Output when hot | Condition | Cell temperature | 445W | 450W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 445 W | 450 W | 100.0% of rated power | | Cool, bright day | 40 °C | 426 W | 431 W | 95.8% of rated power | | Typical summer roof | 55 °C | 408 W | 412 W | 91.6% of rated power | | Hot roof | 70 °C | 389 W | 393 W | 87.4% of rated power | ## Against the whole database | Measure | 445W | 450W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,481 | #3,982 | 14,005 | 450W leads by 1,499 places | | Power density | #5,302 | #4,225 | 14,005 | 450W leads by 1,077 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #10,301 | #9,790 | 14,005 | 450W leads by 511 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #5,617 | #5,168 | 14,005 | 450W leads by 449 places | ## Questions ### Which panel is better: Solar-Fabrik Mono S4 Halfcut Trend White 445W or Solar-Fabrik Mono S4 Halfcut Trend White 450W? According to our database: **Solar-Fabrik Mono S4 Halfcut Trend White **450 W**** has higher module efficiency (**22.53%** vs **22.27%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Solar-Fabrik Mono S4 Halfcut Trend White 445W and Solar-Fabrik Mono S4 Halfcut Trend White 450W? **Solar-Fabrik Mono S4 Halfcut Trend White **445 W**** has a module efficiency of **22.27%**, while **Solar-Fabrik Mono S4 Halfcut Trend White **450 W**** is **22.53%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Solar-Fabrik Mono S4 Halfcut Trend White 445W use vs Solar-Fabrik Mono S4 Halfcut Trend White 450W? **Solar-Fabrik Mono S4 Halfcut Trend White **445 W**** uses **TOPCon** cells; **Solar-Fabrik Mono S4 Halfcut Trend White **450 W**** uses **TOPCon**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Solar-Fabrik Mono S4 Halfcut Trend White 445W and Solar-Fabrik Mono S4 Halfcut Trend White 450W? **Solar-Fabrik Mono S4 Halfcut Trend White **445 W**** has a **30 years** power warranty; **Solar-Fabrik Mono S4 Halfcut Trend White **450 W**** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ### Are Solar-Fabrik Mono S4 Halfcut Trend White 445W and Solar-Fabrik Mono S4 Halfcut Trend White 450W bifacial panels? Both **Solar-Fabrik Mono S4 Halfcut Trend White **445 W**** and **Solar-Fabrik Mono S4 Halfcut Trend White **450 W**** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik S4-DG625-132TMax](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-trend-white-445w/solar-fabrik-s4-dg625-132tmax) - 15 differences, the largest is module efficiency - [Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik S4-DG620-132TMax](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-trend-white-445w/solar-fabrik-s4-dg620-132tmax) - 14 differences, the largest is module efficiency - [Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik Mono S4 Halfcut Trend White 460W](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-trend-white-445w/solar-fabrik-mono-s4-halfcut-trend-white-460w) - 9 differences, the largest is module efficiency - [Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik S4-DG460-96TMax (White)](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-trend-white-445w/solar-fabrik-s4-dg460-96tmax-white) - 9 differences, the largest is module efficiency - [Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik Mono S4 Halfcut Trend White 455W](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-trend-white-445w/solar-fabrik-mono-s4-halfcut-trend-white-455w) - 9 differences, the largest is temperature coefficient - [Solar-Fabrik Mono S4 Halfcut Trend White 445W vs Solar-Fabrik S4-DG455-96TMax (White)](https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-trend-white-445w/solar-fabrik-s4-dg455-96tmax-white) - 9 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/solar-fabrik-mono-s4-halfcut-trend-white-445w/solar-fabrik-mono-s4-halfcut-trend-white-450w Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.